Process for closing bags



June 15 1926.

A.M.BATE$ PROCESS FOR CLOSING BAGS Filed May 6. 1925 Qwwntoo Ade/mer/iBates.

Patented June 15, 1926.

STATES:

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ADELMER M. BATES, OF CHICAGO, ILLINOIS, ASSIGNOR T BATES VALVE B AG COIL-I- PANY, OF CHICAGO, ILLINOIS A CORPORATION OF WEST VIRGINIA.

PROCESS FOR CLOSING BAGS.

Application filed May 6, 1925. Serial No. 28,322.

My invention relates to a process. for producing bags. It has particular reference to such process when concerned with bag fabric or bags of such size or fabric as to make important a hem or fold in connection with one or both of the bag end closures.

My invention is diagrammatically illustrated in the wherein Figure 1 is a diag 'ammaticside elevation of so much of an apparatus as may be used to illustrate my process; Figure 2 is a side elevation of a bag tube; Figure 3 is a side accompanying drawings,

Y elevation of a bag tube with folds; Figure 4 is an enlarged detail side view of parts showing the bag with hemmed closures; Figure 5 is a front view of the same; Figure l is a view similar to the lower portion of Figure 1, but. showing a diflerent form through which successive charges of material may be passed into tube D.

Folds l: and F are formed in the walls of tube 1) where the ends of bags are to come. In the form shown in Figs. 1, and 5. the folds are made by inwardly bending or trim scoping the tube, and a portion (i of the tube walls connects the folds across a space H between the folds. .Seams K, K are sewed through the folds.

In Fig. 1 there is diagrainmatically indicated a sewing device L having two needles M. M adapted to sew scams K, K. through adjacent folds E and F, and a cutter X is indicated adapted to cut the tube wall G along line X between thefolds. the knife passing through space H between the folds.

In Fig.1 there are shown folds E and F formed by folding both walls of the tube outward. the connecting tube crossing space H. between the folds at one side of the line of the remainder of the tube. Where this form of fold is used, it is preferable to form seams K K of the type having more thread along the seam on the side opposite the needl s than on the needle slde of the seam, and to turn the folds to- Ward the side of seam where the needle enters. In this way protection is provided on the side where there is the leastthread along the seam.

In Fig. 3 there are shown folds E and F made by outwardly bending or telescoping the tube, the portion G of the tube wall extending from fold to fold across the outside of space H between the folds. One method of forming strip material into a tube is shown, and a method by which successive charges may be delivered into the tube is diagrammatically indicated, but the manner of forming the tube and the manner of delivering charges are not essential features of this invention. The tube might be completely formed before the filling began, for example, andthe charges might be introduced through openings in the side of the tube or otherwise without changing the most essential features of the invention, and, if desired, both ends of the bag may be closed while it is empty, and a charge may be introduced subsequently through a small opening or valve through the fold or elsewhere.

Three possible forms of fold are shown, but other forms might-be made-within the scope of the appended claims, and the time of forming the folds'is essential onlv as specified in the claims which define the invention.

l claim:

l. in the prmluction of bags from lengths of bag lllitlt'llttl. the meth d which consis in making" folds transversely across a length of bag material to form reinforced ends for bag and scverin; said length adjacent each fold after the f rmation of the fold.

2. In the production of bags from lengths o 1' bag material. the method which consists in making folds transversely across a length of bag material to form reinforced ends for bags, uniting the several plies in each fold. and severing said length adjacent each fold after'the plies of the fold are united 3. In the production of bags fronrlengths of bag material. the method which consists in forming adjacent pairs of transverse folds at spaced intervalsalong'alength of bag material to form reinforced ends for bagsand thereafter severing said length between the folds of each pair.

l. In the production of bags from lengths of bag material, the method Which consists in forming adjacent pairs of transverse folds at spaced intervals along a length of bag material to form reinforced ends for bags, uniting the several plies of each fold, and thereafter severing said length between the folds of each pair.

5' The method of producing bags from a bag tube which consists in forming folds across the tube, uniting the several plies of each fold and the sides of the tube to make tube closure at each fold, and severing the tube adjacent each closure, the severance following the formation of the adjacent closure.

6. The method of producing bags from a bag tube, which consists in forming adjacent pairs of transverse folds at spaced intervals along the tube to form reinforced bag ends, uniting the several plies ofthe fold and the sides of the tube to form a reinforced closure at each fold, and severing the masses tube between the folds of each pair after the formation of that pair of folds.

7. The method of producing bags from a bag tube, which consists in forming "folds across the tube, sewing through the several aplies of each fold and the sides of the tube to make a tube closure at each told, and severing the tube adjacent each closure, the severance following the formation of the adjacent closure.

8. The method of producing bags from a bag tube, which consists in forming adjacent pairs of transverse folds at spaced intervals along the tube, sewing through the several plies of each fold and the bag sides to form a reinforced tube-closing seam at each fold, and severing the tube between each pair of seams, the severance following the formation of the adjacent seams.

In testimony whereof I have hereunto signed my name to this specification.

ADELMER M. BATE? 

